SIONICS Bolt Carrier Group for .223/5.56- Phosphate

Original price was: $159.95.Current price is: $149.95.

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Product Description

The Greatest Bolt Carrier Group for your AR-15. The SWS Bolt Carrier Group is HP/MPI Tested – Auto Version – Machined to USGI Specifications, Phosphate Coated with use of OCKS (Optimized Carrier Key Screw) and properly staked using a MOMOAKS. Now includes the SIONICS Logo Engraved on the Right Side of the Carrier.

These properly hardened parts insure a strong staking and proper Gas System functioning. Furthermore, each carrier has a gasket formed by aviation Permatex that is applied by hand to the mating surfaces between the gas key and the carrier.


  • Mil-spec Carpenter No. 158® Steel
  • HPT Bolt – High Pressure Tested / Proof
  • MPI Bolt – Magnetic Particle Inspected
  • Shot Peened Bolt
  • Chrome Lined Carrier – Auto
  • Chrome Lined Gas Key
  • Gas Key Hardened to USGI Specifications
  • OCKS (Optimized Carrier Key Screw)
  • Key Staked properly using a MOMOAKS.
  • Tool Steel Extractor
  • Sprinco Heavy Duty Extractor Spring
  • Black Extractor Insert
  • Machined to USGI Specification

Prior to shipping, all SIONICS Bolt Carrier Groups are Test Fired for function. Because of the Test Firing Procedure, the Bolt Carrier Group will show handling marks consistent with these Quality Control Procedures.




Technical Information


Carpenter 158




5.56 NATO / .223 Remington

Firearm Compatibility

Catalog Location

California Prop 65 Warning

WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information visit